The Autojack EHB2KW PTC (Positive Temperature Coefficient) heater is easy to use and runs of a standard 13amp supply. The heater has 3 different heat output settings, which are 25 watts, 1350 watts and 2000 watts. On the maximum heat the output is 6,820 BTUs per hour. When on the low setting of 25 watts it can be used as a conventional fan. Weighing only 3.1kg it is both lightweight and portable making this heater ideal for both office and home use.